<html>
<head>
<title>登录</title>
</head>
<body>
  <form action="http://127.0.0.1:8080/login" method="post">
      用户名:<input type="text" name="username">
      密码:<input type="password" name="password">
      <input type="submit" value="登录"/>
  </form>
</body>
</html>
